I have had 2 instances of this error that resulted in my mythbox actually
shutting down. I don't find any evidence of a kernel panic and the last
lines in the mythbackend.log are the errors above. Nothing in any logs that
I can find so I've no clue what actually happened.
All I know is that myth was on, recording a show, these errors showed up for
the entire length of the recording, and at 15:24 the machine shuts down.
Both recordings ended up being exactly 15:09.